Improvement in spark-arresters



W. m M2 @M WM @ooeoioooo al M @tutti @Wina JOHN WILLIAM BOWKER, OF SACRAMENTO CITY, CALIFORNIA.

Letterspatm No. 95,975, dated october 19, 1869.

IMPROVEMENT IN' `SIz'fARII-ARRESTERS.v

The Schedule referred to in these LetterePatent and 'i'naking part of the lame.

To all whom it lmay concern:

Be it known thatI, J oHN WILLIAM BOWKER, of the city and county of Sacramento, State of California, have invented an Improved Smoke-Stack and Spark-Arrester; and I do hereby declare the following description andacc-ompanying drawings are sufcient to enable any person skilled in the art or science to which it most nearlyrappertains, to make and use my said invention or improvements, without further invention or experiment.

The nat-ure of my invention is to provide an improvement in smoke-stacks, and more especially of that class in which the exhaust-steam from the cylinders is discharged into the stack, in order .to create a draught, as in locomotives; and

,It consists in placing a series of perforated plates near the top of the stack, each opening being provided with a short tube projecting downward, and not in line with the tubes ofthe plate above, in order to intercept the sparks.

It further consists in leaving spaces at the sides of all but the upper plate, and connecting the chamber, which surrounds the inner chimney, with the smokebox by pipes, so that the cinders and sparks are carried back into this box by the force of the exhaust, and are there consumed.

Referring to the accompanying drawings, for a more complete explanation of my invention- A is the outer casing or stack, and

B, the inner funnel or chimney, into which the eX- haust-pipes lead, and through which the smoke and other products of combustion from the ire-box pass.

Above the funnel B is fastened the ordinary conc C, which receives the rst shock of the blast, and, as far as possible, turns the einders downward into the chamber D, surrounding the funnel.

The cone has a short cylinder, or, rather, a broad, curved band, E, of sheet-metal, surrounding it. The upper edge of the band is a little above the edge. of the cone, and its lower edge extends the same distance below it, and is near the side of the stack A, sothat it leaves a narrow space all around.

In the upper part of the stack is a number of circular plates or covers, F G H, separated a short distance from each other, and they may be fastened together, as shown, or arranged to be removed sep-` arately.

from which pipes or tubes a a a project downward a short distance, those from the upper plate reaching nearlyto the second plate, and those from the second v to near the lower one.

The tubes are so placed that each set open between those above and below, so that any sparkswhich may pass through the first plate F, will strike the plate above, and be thrown back, and similarly those that pass the second plate G, will be arrested by the upper plate I-I.

This plate entirely fills the top of the stack, but the `other plates F and G have some space around them, so that the arrested sparks can fall into the chamber I), before mentioned.

rlwo or more curved pipes, I I, lead from the chamber 'D to the smoke-box beneath, and the force of the exhaust causes a return-draght or current, which will-carry the cinders and sparks from the chamber D downward into the smoke-box, where the greater part of them will be consumed.

The engine being inmotion, sparks and cinders are thrown up against the cone Cat each exhaust. A portion of these will be thrown back, and fall inside the band E, into the chamber D, another portion will be stopped by the plate F, while the small quantity that may pass through the tubes of this plate, will be arrested by the plates G and H, and falling from 14 and G, down aroud their outer edges, and outside the bandE, they will be deposited in the chamber D, from whence they will be carried int`o the smoke-box, as before described.

By this arrangement, the sparks are entirely arrested and extinguished, while the draught through the chimney will not be in the least interfered with.

Having thus described my invention,

' That I claim, and desire to secure by Letters Patf ent, is

1. The perforated plates F G H, provided with short tubes e a a, constructed and arranged substantially as and for the purpose herein described.

In witness whereof', I have hereunto set my hand and seal.

JOHN WILLIAM BOWKER. [1.. s.] Witnesses:

HUBERT BUReEss, JOHN L. BOONE. 

